Dialless radio



Oct. A9, 1928.

D. D. BAST DIALLEss RADIO Filed Feb. 11, 192'?v Patented Oct. 9, 1928.

UNITED STATES DALE D. BAST, F BRADDYVILLE, IOWA.

DIALLEss RADIO.

Application led February 11, 1927. Serial No. 167,519.

This invention relates to wireless apparatus. for the transmission andreception of waves and including variable control mechanism containing adal or like rotary part.

The invention aims to replace the dial or like rotary part by means of apin or analogous recilinearly movable element, thereby simplifying theconstruction and the operation of the apparatus.

In accordance with the invention the shaft of the control mechanism,such as a variable condenser, is provided in its length with a pluralityof arms set at different relative angles and the panel has rows ofopenings l5 formed therein opposite the respective arms to receive' apin or like part which, when thrust through -an Opening and pressedforward to its llm't engages an arm and turns the shaft of the controla'determindate distance. l. i

While the drawingsillustrate a preferred embodiment of the invention, itis to be understood that in adapting the means to, meet specific needsand requirements, `the design may be varied and such other changes inthe minor details of construction may be resorted to within the scope'ofthe invention as claimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof,reference is to be had to the following description and the drawingshereto attachd, in whichl Figure 1 is a front view of a radio-receiver,embodying the invention.

Figure 2 is a fragmentary sectional view on the line 2 2 of Figure 1,showing the operating pin, or like part.

Figure 3 is a detail view of one of the arms showing the manner ofsecuring it to the control shaft in the required adjusted position, theparts being in section.

Corresponding and like parts are referred to in the followingdescription and designated in the several views of the drawings by likereference characters.

The numeral 1 designates the usual cabinet of a radio receiver, and 2the panel which is attached to the base 3. The control 4 is representedas consisting of a variable condenser and 5 is the operating shaft. Aplurality of arms 6 are mounted upon the shaft 5 to turn therewith andare disposed at different relative angles, as indicated most the panel2, as well as at different. angles, To admit of the arms 6 bel-ngadjustable on the shaft 5. each of the arms is provided at one end'with'an eye 7 of a size to snugly receive the shaft 5, and a. screw 8threaded into an opening formed in a side of the eye 7 is adapted toengage the shaft 5 and secure the arm in the required adjusted position.In this manner the arms may be adjusted along the shaft or angularlywith reference thereto. A contractile spring 9 is connected at one endto the base 3 and at its opposite end to an arm 10 projecting from theshaft 5, and this spring normally maintains the shaft 5 in apredetermined position, and operates to return it to normal positionwhen released after being operated.

Rows of openings 11 are formed in the panel 2- oppos'te the several arms6, and a pin 12, or like part, is adapted to be thrust through any oneof the openings 11 and pressed inward to move the arm 6 in line with therow of openings through which the pin 12 has been passed. When the pin12 has been thrust through the opening of the panel to the limit ofitsmovement the shaft 5 will have been moved a determinate distancedepending upon the selected opening of the row through which the pin 12has been passed and the inclination of the arm 6 with which the pin isin engagement, asv will be readily appreciated.

The face of the panel will be provided with numbers adjacent the rows ofopenings 11 to designate the wave lengths of different transmittingstations and these numbers are arranged in order and the arms 6 are sop0- sitioned that when the pin 12 is thrust through a selected openingthe control will be adjusted to the desired wave length indicated by thenumber adjacent the opening through which the pin has been inserted. Inthis manner the wave lengths may be readily determined and ascertained.

A control shaft 13 is geared to the operating shaft 5, as indicated mostclearly in Figure 2, so that a partial rotation of the operating shaftwill effect an augmented rotation of the control shaft 13, therebymaking it possible to rotate the shaft 13 a maximum distance foradjustment by thrusting the tuning pin 12 through a selected opening ofa row of openings 11. The gear wheels connecting the operating shaftwith the control shaft 13 may be of any determinate ratio, as will bereadily appreciated. The large gear Wheel 14 is fast to the shaft 5 andthe small gear Wheel 15 is fast to the shaft 13.

A pair of spring clips 16 is associated With each of the openingscomprising the rows of openings 1l and serves to grip the pin 12frictionally and prevent displacement thereof when introduced into aselected opening and pressed inward to the limit of its movement or toany desired point. By having the members corresponding to the Wavelengths of the different transmitting stations raised or depressed thereceiver may be operated and tuned by the blind or in places where dialreadings are not observable. Moreover, a given station Whose Wave lengthis known may be selected and tuned in at a moments notice by thrustingthe tuning pin 12 into the proper one of the openings l1.

Having thus described the invention, I claim:

1. A radio mechanism including a controlling device having a shaft, aplurality of arms projecting from the shaft at different relativeangles, a panel provided With rows of openings opposite the respectivearms, and a pin adapted to be passed through a selected opening toengage an arm and move the control a predetermined distance.

2. In radio apparatus a control having a shaft, a plurality of armsadjustable on the shaft both in the length thereofand angularly, aspring having connection With the control to maintain it in givenposition, a panel provided with rows of openings opposite the respectivearms, and a pin adapted to be passed through a selected opening toengage an arm and move the saine a predetermined distance.

In radio apparatus, a control device including a shaft, an operatingshaft geared to the control shaft, arms fast to the operating shaft anddisposed at various angles, and a tuning pin adapted to coact With eachof the arms and move the same through a pre-r determined angle. i j t 4.In radio apparatus, an inclined member connected with a controllingdevice, a partprovided with a row of openings opposite the inclinedmember, a pin adapted to be thrust through a selected opening to movethe inclined part through a. predetermined# angle. and pairs of springclips associated with the openings to frictionally engage the tuning pinand hold it in the required adjusted position.

In testimony whereof I aiiiX my signature.

DALE D. BAsT. [1.. 5.]

